Fast Lamb wave energy shift approach using fully contactless ultrasonic system to characterize concrete structures

Suyun Ham, John S. Popovics

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ultrasonic techniques provide an effective non-destructive evaluation (NDE) method to monitor concrete structures, but the need to perform rapid and accurate structural assessment requires evaluation of hundreds, or even thousands, of measurement datasets. Use of a fully contactless ultrasonic system can save time and labor through rapid implementation, and can enable automated and controlled data acquisition, for example through robotic scanning. Here we present results using a fully contactless ultrasonic system. This paper describes our efforts to develop a contactless ultrasonic guided wave NDE approach to detect and characterize delamination defects in concrete structures. The developed contactless sensors, controlled scanning system, and employed Multi-channel Analysis of Surface Waves (MASW) signal processing scheme are reviewed. Then a guided wave interpretation approach for MASW data is described. The presence of delamination is interpreted by guided plate wave (Lamb wave) behavior, where a shift in excited Lamb mode phase velocity, is monitored. Numerically simulated and experimental ultrasonic data collected from a concrete sample with simulated delamination defects are presented, where the occurrence of delamination is shown to be associated with a mode shift in Lamb wave energy.

Original languageEnglish (US)
Title of host publication41st Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 34
EditorsDale E. Chimenti, Leonard J. Bond
PublisherAmerican Institute of Physics Inc.
Pages122-127
Number of pages6
ISBN (Electronic)9780735412927
DOIs
StatePublished - Jan 1 2015
Event41st Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2014 - Boise, United States
Duration: Jul 20 2014Jul 25 2014

Publication series

NameAIP Conference Proceedings
Volume1650
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference41st Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2014
CountryUnited States
CityBoise
Period7/20/147/25/14

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ham, S., & Popovics, J. S. (2015). Fast Lamb wave energy shift approach using fully contactless ultrasonic system to characterize concrete structures. In D. E. Chimenti, & L. J. Bond (Eds.), 41st Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 34 (pp. 122-127). (AIP Conference Proceedings; Vol. 1650). American Institute of Physics Inc.. https://doi.org/10.1063/1.4914601